gosling



(No Modem 3 Sh etsSheet 1.

H. J. osum. MACHINE FOR GRINDING UHISEL S AND OTHER TOOLS.

No. 388,966. Patented Sept. 4, 1888.

INVENTOR WITNESSES N. PLTERS, Pmouhn mn Wnmngtnn. u a

(No Model.)

3 Sheets-Sheet 2.

H. J. GOSLING. MACHINE FOR GRINDING GHISELS AND OTHER TOOLS No. 388,966. Patented Sept. 4, 1888.

WITILJESSES: y W ZI lNVENTOR pMr. want-l e. n c.

(N0 Model-.) 3 SheetsSheet 3.

H. J. GOSLING.

MAGHINE FOR GRINDING GHISELS AND OTHER TOOLS. No. 388,966 Patentedfiept. 4, 1888.

WETNESSES: !NVENTOR r A e/W N. PETERS Phalelikhcgrapher, Wnbinglon, o. c

UNITED STAT S ATENT (lesion.

HEXRY J. GOSLIXG, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO GEORGE BARNETT AND HENRY BARNETT, OF SAME PLACE.

MACHINE FOR GRiNDlNG CHISELS AND OTHER TOOLS.

SPECIFICATION forming part of Letters Patent No. 388,966, dated Eeptember 4-, 1888,

Application filed May 20, 1885. Serial No. 166,208. No model.)

Tb all whom it may concern:

Be it known that I, HENRY J. GOSLING, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented anew and Improved Machine for Grinding Ghisels and other Cutting-Tools; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the annexed drawings, making part hereof.

The nature of my invention will fully appear from the following description and claims.

In the drawings, Sheet 1, Figure l is an elevation or side view of my machine. Sheet 2, Fig. 2, is a plan view of the same. Sheet 3,

Fig. 3, is an end View of my machine; Fig. 4, a broken end view from the end opposite to that illustrated in Fig. 3, showing a broken section of the revolving grindstone and a crosssectional view of part of the frame. This view is designed simply to show a chisel in its holder impinging by its end against the stone. Fig. 5 is a detached plan view of the base-plate, carriage, and tool-holder, with its connecting parts, showing, also, by breaking away the top of the holder, the means for moving the latter hack and forth. Fig. 6, Sheet 1, is a detached broken perspective view of the mechanism for raisingand lowering the outer end of the toolholder to tilt the tool against the grindstone.

A is a loose pulley mounted on the shaft B, which latter is sustained in bearings G 0. set upon the main frame 1) of the machine. D D are the legs or standards supporting the latter.

E is an eccentric mounted on the shaft B.

\Vith the exception of the chisel-holder and its spiral mechanism allthe otherparts shown in Fig. l are duplicated on the other side of the machine. (See Fig. 2.)

F is a connecting-rod providedwith a righthanded screw, F, at one end,and aloft-handed screw, F, at the other end. A loose halved ring, G, surrounds or clasps the eccentric E, the two halves being joined or connected by bolted flanges G t. The eccentric E is secured rigidly on the shaft B by the set-screw E. The connecting-rod F is secured to the ring G by the socket-piece G",which has a female screw-thread to correspond with and receive the left'handcd thread, F, of rod F.

H is a grindstone, the shaft or axle H of which is mounted in reciprocating bearingblocks I I. (See Fig. 2.) These blocks slide to and fro or reciprocate in guides 1 l l l, the guides I I being sustained by standards J J. Socketpieces or blocks K K are pivoted to the blocks I I, respectively, by pivots or pins L L. These pieces K K are provided with female screw-threads to correspond with and receive theright-handed screw threads,F F, of the connecting-rods F F.

M M are collars secured rigidly upon rods F F and provided with holes or depressions into which a lever may be inserted to turn or revolve the rods in either direction. They may be polygonal collars adapted to be gripped and turned by a wrench for the same object. The turning of these rods by means of these collars will practically lengthen or shorten the rods F F to shift the position of the stone, whereby, as it revolves and reciprocatcs, an nnworn or slightly-worn part of the lattcr may be brought into contact with the tool being ground, for the right and left screws, F F, will draw the blocks I I toward or drive them away from the eccentrics E E, as the rods F F are turned one Way or the other.

N is a loose clutch grooved and keyed by a feather upon the shaft B and adapted to be rcciprocated at will by means of the lever N, which is pivoted to the frame D of the machine at one end at N, and connected with collar N by a pin, N, which sets in an annular groove in said clutch.

O is a lug or catch on the hub of loose pulley A to engage with the clutch N. This device is, however, well known to skilled mechanics.

The following relates to the chiselholding mechanism located at one side of the grindstone near its periphery and upon the top of the main frame. The chisel is ground upon the flat side of the stone instead of upon its convex face or tread.

P, Fig. 4, Sheet 3, is the holder-block, P constituting the back thereof against which the chisel to be sharpened rests; P", the movable clamp-piece, a back extension-piece from which extends into the block P, and is provided with a vertical hole, in which a stemeccentric (shown in cross-section at 3 Fig. 5) from the lever Q (see Fig. 4) operates to shift the clamp-piece P backward and forward.

The block P is pivoted in place to the two ears R 1%, which set rigidly upon the base block or carriage B. This carriage It slides 5 upon the plate S, and is moved at will back and forth by the handle S and screw S. This screw-stem S passes through a plain hole in bearing T of the plate S and engages with a female screw-threaded hole in carriage R.

U is a chisel, to be ground or sharpened, held between the back or rest P and clamp P at an angle, so that the side of its cuttingcdge impinges against the side of the stone H.

V (see Fig. 6) is an upright slotted ear, the 2 foot of which is screwed or bolted to the carriage R. A set-screw, V, passes through this slot into the outer end of the pivoted holder P. By loosening this set-screw the outer end of holder P can be raised or depressed, which will tilt the chisel, gripped by the holder at its inner end, at a greater or less angle against the side of the stone H. (See Fig. 4, Sheet 3.)

V, Fig. 1, is a vertical belt engaging upon a pulley, Y, upon the axis of the grindstone.

This belt is connected with a pulley and shaft above, and is vertical to permit the horizontal reciprocation of the pulley of the stone with the latter.

X is a belt to turn the pulley A.

The operation is as follows: Atool, U, to be sharpened is set between the movable block P and the rest P, (see Fig. 4,) and the block P is tightened up against the tool by a turn of the lever Q,as described. Itis then pushed up close to the stone by means of the carriage R, actuated by the handle S and screw S. When it is brought sufficiently close to the stone,the set-screw V is loosened,(see Fig. 6,) and the outer end of holder P is raised until 0 the upper edge of tool U is brought against the side of the stone H. (See Fig. 4.) The pulley A,by means of the lever N and sleeve N, is then placed in gear with the shaft 13. This pulley, actuated by the belt X, revolves 5 said shaft, actuates the eccentric E, and, by the medium of connecting-rods F,rapidly and continuously reciprocates the grindstone H. The grindstone actuated by belt WV, revolves, and the tool is ground by the revolving stone,

While the reciprocation of the latter continually varies the surface upon which the tool is impinging.

It will be observed that by varying the distance of the tool from the stone by bringing the carriage R closer to or farther from the latter the tilt of the holder P to bring the tool against the stone will result in the said tool being placed at a greater or less angle against the latter,and a longer or shorter bevel of the edge of the tool will be the result. The reciprocating action of the stone is continuous when the machine is in operation, and since its side is employed to grind the tool instead of its convex surface or tread the tool will receive a straight edge,and each bevel of said edge will be a plane and not concave.

When the operation has once been begun, tools can be sharpened and removed and new ones applied without stopping the machine.

After the holder Phas once been set to a desired angle, by means of the ear V and setscrew V, it need not be varied therefrom, and all the tools ground can be finished exactly alike, thus insuring uniformity in the work. The slotted ear V is graduated or marked like a rule, whereby when the end of the holderis raised it can be noted and fixed and a standard of elevation may thus be established.

I am Well aware that a slow traversing mo tion has been imparted to grindstoncs by means of screw-threaded rods and other devices before my invention, and I do not claim these, as this portion of my invention relates to a stone provided with mechanism to impart to it a rapid reciprocating motion, such as results from the employment of an eccentric in combination with it.

That I claim is- 1. In a toolgrinding mechanism,the combination of a revolving grindstone, H, mounted in bearing-blocks I, resting in guides, shaft B, eccentric E, and connecting-rod F, whereby a rapid reciprocating motion is communicated to the revolving stone, substantially as described.

2. In a tool-grinding mecl1anisn1,the combination of a revolving grindstone, H, mounted in bearing-block I, resting in guides, shaft 13, eccentric E,connecting-rod F, whereby a rapid reciprocating motion is communicated to the revolving stone, and a tool-holder, P, located at one side of the stone, whereby the tool to be ground is held against the reciprocating fiat side of the same, substantially as described.

HENRY J. GOSLING.

Witnesses:

GEORGE E. BUOKLEY, WM. H. CARSON.

ICO 

